libgdx学习记录24——九宫格NinePatch
NinePatch用于图片纹理拉伸显示。当图片拉伸时，4个角不会拉伸，而只有中间的部分会拉伸，适合做圆角矩形类的Button。
简单示例：
1 package com.fxb.newtest; 2 3 import com.badlogic.gdx.ApplicationAdapter; 4 import com.badlogic.gdx.Gdx; 5 import com.badlogic.gdx.Input; 6 import com.badlogic.gdx.InputAdapter; 7 import com.badlogic.gdx.graphics.GL10; 8 import com.badlogic.gdx.graphics.Texture; 9 import com.badlogic.gdx.graphics.g2d.NinePatch; 10 import com.badlogic.gdx.graphics.g2d.SpriteBatch; 11 import com.badlogic.gdx.graphics.g2d.TextureRegion; 12 13 public class Lib029_NinePatch extends ApplicationAdapter{ 14 15 NinePatch patch; 16 SpriteBatch batch; 17 TextureRegion region; 18 19 int width; 20 int height; 21 22 @Override 23 public void create() { 24 // TODO Auto-generated method stub 25 super.create(); 26 //TextureRegion region = new TextureRegion( new Texture( Gdx.files.internal( "data/badlogic.jpg" ) ) ); 27 region = new TextureRegion( new Texture( Gdx.files.internal( "data/button_green.png" ) ) ); 28 patch = new NinePatch( region, 13, 13, 13, 13 ); 29 batch = new SpriteBatch(); 30 31 width = 100; 32 height = 30; 33 } 34 35 @Override 36 public void render() { 37 // TODO Auto-generated method stub 38 super.render(); 39 40 if( Gdx.input.isKeyPressed( Input.Keys.LEFT ) ){ 41 width-=2; 42 } 43 else if( Gdx.input.isKeyPressed( Input.Keys.RIGHT ) ){ 44 width+=2; 45 } 46 else if( Gdx.input.isKeyPressed( Input.Keys.DOWN ) ){ 47 height-=2; 48 } 49 else if( Gdx.input.isKeyPressed( Input.Keys.UP ) ){ 50 height+=2; 51 } 52 53 Gdx.gl.glClearColor( 1, 1, 1, 1 ); 54 Gdx.gl.glClear( GL10.GL_COLOR_BUFFER_BIT ); 55 56 batch.begin(); 57 patch.draw( batch, 10, 10, width, height ); 58 batch.draw( region, 10, 20+height, width, height ); 59 batch.end(); 60 } 61 62 @Override 63 public void dispose() { 64 // TODO Auto-generated method stub 65 super.dispose(); 66 } 67 68 }
结果：
上面的是原生态的图片，下面使用了NinePatch，拉伸的时候4个角没有变化，没有出现变形，适合做Button等控件。
